diff --git a/chore/_xtool/llcppsigfetch/parse/cvt.go b/chore/_xtool/llcppsigfetch/parse/cvt.go
index a87a7aed..b8b6dc7c 100644
--- a/chore/_xtool/llcppsigfetch/parse/cvt.go
+++ b/chore/_xtool/llcppsigfetch/parse/cvt.go
@@ -163,6 +163,7 @@ func visit(cursor, parent clang.Cursor, clientData unsafe.Pointer) clang.ChildVi
 		// todo(zzy)
 	case clang.CursorMacroDefinition:
 		// todo(zzy)
+		ct.ProcessMarco(cursor)
 	case clang.CursorEnumDecl:
 		// todo(zzy)
 	case clang.CursorClassDecl:
@@ -240,6 +241,42 @@ func (ct *Converter) ProcessFunc(cursor clang.Cursor) *ast.FuncDecl {
 	return fn
 }
 
+// current only collect marco which defined in file
+func (ct *Converter) ProcessMarco(cursor clang.Cursor) {
+	if ct.curFile == nil {
+		return
+	}
+	name := cursor.String()
+	defer name.Dispose()
+
+	ran := cursor.Extent()
+	var numTokens c.Uint
+	var tokens *clang.Token
+	ct.unit.Tokenize(ran, &tokens, &numTokens)
+	tokensSlice := unsafe.Slice(tokens, int(numTokens))
+
+	macro := &ast.Macro{
+		Name: &ast.TokenInfo{
+			Token: ast.Token(tokensSlice[0].Kind()),
+			Lit:   c.GoString(ct.unit.Token(tokensSlice[0]).CStr()),
+		},
+		Body: make([]*ast.TokenInfo, 0),
+	}
+
+	if numTokens > 1 { //have body
+		for i := 1; i < int(numTokens); i++ {
+			tok := tokensSlice[i]
+			tokStr := ct.unit.Token(tok)
+			macro.Body = append(macro.Body, &ast.TokenInfo{
+				Token: ast.Token(tok.Kind()),
+				Lit:   c.GoString(tokStr.CStr()),
+			})
+			tokStr.Dispose()
+		}
+	}
+	ct.curFile.Macros = append(ct.curFile.Macros, macro)
+}
+
 type visitFieldContext struct {
 	params    *ast.FieldList
 	converter *Converter
diff --git a/chore/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test/llgo.expect b/chore/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test/llgo.expect
new file mode 100644
index 00000000..72eb299f
--- /dev/null
+++ b/chore/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test/llgo.expect
@@ -0,0 +1,24 @@
+#stdout
+TestDefine Case 1:
+{
+	"temp.h":	{
+		"path":	"temp.h",
+		"decls":	[],
+		"includes":	[],
+		"macros":	[{
+				"Name":	{
+					"Token":	2,
+					"Lit":	"foo"
+				},
+				"Body":	[{
+						"Token":	3,
+						"Lit":	"1"
+					}]
+			}]
+	}
+}
+
+
+#stderr
+
+#exit 0
diff --git a/chore/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test/preprocess.go b/chore/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test/preprocess.go
new file mode 100644
index 00000000..d342b2b0
--- /dev/null
+++ b/chore/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test/preprocess.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/chore/_xtool/llcppsigfetch/parse"
+)
+
+func main() {
+	TestDefine()
+}
+
+func TestDefine() {
+	testCases := []string{
+		`#define foo 1`,
+	}
+
+	for i, content := range testCases {
+		converter, err := parse.NewConverter(content, true)
+		if err != nil {
+			panic(err)
+		}
+
+		_, err = converter.Convert()
+		if err != nil {
+			panic(err)
+		}
+
+		json := converter.MarshalASTFiles()
+		c.Printf(c.Str("TestDefine Case %d:\n%s\n\n"), c.Int(i+1), json.Print())
+
+		converter.Dispose()
+	}
+}
diff --git a/chore/_xtool/llcppsigfetch/parse/dump.go b/chore/_xtool/llcppsigfetch/parse/dump.go
index c8c20c90..a72bac5a 100644
--- a/chore/_xtool/llcppsigfetch/parse/dump.go
+++ b/chore/_xtool/llcppsigfetch/parse/dump.go
@@ -34,9 +34,24 @@ func MarshalASTFile(file *ast.File) *cjson.JSON {
 	// json:macros,omitempty
 	if file.Macros != nil {
 		macros := cjson.Array()
+		for _, m := range file.Macros {
+			marco := cjson.Object()
+			marco.SetItem(c.Str("Name"), TokenInfo(m.Name))
+			body := cjson.Array()
+			for _, b := range m.Body {
+				body.AddItem(TokenInfo(b))
+			}
+			marco.SetItem(c.Str("Body"), body)
+			macros.AddItem(marco)
+		}
 		root.SetItem(c.Str("macros"), macros)
 	}
-
+	return root
+}
+func TokenInfo(t *ast.TokenInfo) *cjson.JSON {
+	root := cjson.Object()
+	root.SetItem(c.Str("Token"), cjson.Number(float64(t.Token)))
+	root.SetItem(c.Str("Lit"), cjson.String(c.AllocaCStr(t.Lit)))
 	return root
 }